Spoked wheel



Dec. 23, 1941. 1 BERGER E-l-AL *A 2,267,263

SPOKED WHEEL Filed Nov.A 13, 1939 Jaz/(as er er (Irma/uz K au@ wlw.

.AGENT Patented Dec..23, 1 941 SPOKED WHEEL JuliusBerger..Berlin-Wilhelmsruh, and Hermann Klaue, Berlin-Frohnau, Germany,assignors to ArguslMotoren Gesellschaft m. b. H.

Application November 13, 1939, Serial No. 303,978 In Germany August 16,1939 3 Claims.

This invention relates to a spoked wheel and brake assembly,particularly adapted for aircrafts.

As is well known, large braking torques are required for arresting thelanding motion of modern'aircrafts. Recently, the development of thebrake arrangement could not be improved in the same manner as thegeneral development of= aircrafts, as the dimensions of the tire aregiven so. that an enlargement of the diameter of the wheel body andthereby an enlargement of the brake disc is not possible. Moreover,larger dimensions of the wheel body would cause an increase in theweight of the carriage supporting the landing wheels which under allcircumstances must be prevented. In the contrary, care must be takenthat the brakedoes not increase the' weight of the carriage andconsequently also that without increasing the weight of the carriagesupporting the landing wheels and without unduly heating parts of theWheel due to the absorption of the heat resulting from the brakingpressure.

The object aimed at is obtained according to the inventionsubstantiallyby the fact that the spoked wheel consists of two substantially equalhalves and that the spokes of each half of the wheel are connected toeach other at the surface of both halves facing each other with a viewto form a closed braking area.

'I'he spokes are absolutely necessary for the required strength of thewheel and the amount of material required for connecting the spokes toeach other is only very small in comparison, to the.very large heatconducting surface obtained by this connection.

In the accompanying drawing showing by way of example an embodiment ofthe invention,

Fig. 1 is a longitudinal section along the line I-I of Fig. 2 showing aspoked wheel and brake assembly embodying the principles of theinvention, Fig. 2 is a front view of the wheel of Fig. 1, an Fig. 3 is asection along the line 3-3 of Fig. 1

withparts broken away to show the spokes of one portion of the wheel.

Referring' to thev drawing, the spoked wheel members I0 and Il securedtogether by screw bolts I2. A brake assembly, generally designated withI3, is provided between the two rims I0 and II. The brake I3 is operatedin a manner known per se by pressure iluid supplied to the brakeassembly I3 by conduit I4.

Wheel rim members, I0, II aresupported by short spokes I5 and longspokes I5. The individual spokes I5, I5' of the wheel are thickened attheir bases or roots as at I6 to form a closed coherent area4 extendingaround the wheel.

Rim members I0,' II are rotatably mounted in anti-friction bearings Iland I8, respectively. The hub comprises an inner hub member, and

adjacent hub portion 20 and an outer hub membei-2 I. In'ner hub memberI9 supports ball bearing Il. vBearing Il is pressed against hub portionI9 by an inner ring 22 provided `with an inner thread and screwed ontohub portion I9. Outer ring 23 having an louter thread is screwed ontorim I0, thus pressing hub portion I9 against hub portion 20. Rings 2 2and 23 are Secured against rotation by pins 24 and 25, respectively.Ring 26 has an outer thread and is screwed onto rim I I to securebearing I8. Hub portions 20 and 2I are secured together by screw bolts2l. As shown in Fig. 2, the heads of bolts 21 are provided withhexagonal or octagonal inner recesses 28 to permit introduction of asuitable spanner.

Nipple 29 is connected with a hydraulic fluid conduit not shown in thedrawing. The hyf' draulic fluid is supplied through canal 83' in theouter hub member 2| and through conduit I4 in hub portion 20 into aninflatable rubber bag 3l. Adjacent rubber bag 3|4 two metal discs 32, 32

are provided having overlapping angea. The

` rim members Il, Il to protect the tire against excessive heat., s

The coherent area formedby connecting members or roots I6 of spokes I5.I5' and covered with liners 34, 34 cooperates with the brake linings 33,33 of, the brake assembly I3. On account of the large area of contactbetween the liners 34, 34,. and the brake assembly I3, the brakeoperates very emciently. Dueto @e design in accordance` :omprises twosubstantially equal halves or rim with the invention the spokes l5, I5'are available for conducting away the amount .of heat re.

sulting from the braking operation without the necessity to provide anyadditional cooling means whereby the weight of the wheel would beincreased.

What we claim is: l. A combined wheel and brake assembly particularlyadaptable for aircraft, comprising two l similar halves comprising rimand hub members supported by spokes, the inside of each set of saidspokes being connected by a ange to form areas substantially paralleland facing each other, and a brake mechanism arranged between saidareas. 2. In combination a wheel and br-ake assembly particularlyadapted for aircraft, comprising two similar halves rotatably mounted ona fixed axle, V

.'s-aid halves comprising rim and hub members supported by spokes, theinside of each set of said spokes being formed to provide substantiallyparallel and adjacent flanges facing each other, and a brake mechanismarranged between said flanges.

3. In combination a wheel and brake assembly particularly adapted foraircraft, comprising two similar halves rotatably mounted on a fixedshaft, said halves comprising rim and hub members supported by spokes,the inside of each set of said spokes being connected by a flange toform areas facing each other in adiacent rela-

